Abstract: Provided is a headphone system, comprising a sound module and a headphone body. The sound module comprises a module attachment interface, a module audio interface, and a controller. The headphone body comprises a first earphone; a second earphone; and a headphone attachment interface to provide removable attachment with the module attachment interface a headphone audio interface to couple with the module audio interface when the module attachment interface is engaged with the headphone attachment interface. The headphone audio interface communicates audio signals from the sound module to the first earphone and the second earphone when the module attachment interface is engaged with the headphone attachment interface. The controller transmits audio signals from the sound module to the module audio interface to further transmit to the headphone audio interface which transmits to at least one of the first and second earphones via the headphone audio interface.

Abstract: Provided is a portable charging station for a portable electronic device having a wireless power receiver to supply power to the portable electronic device. The portable charging station comprises a base having a wireless power transmitter and a battery source providing power to the wireless power transmitter and an attachment structure to position the portable electronic device to engage the base at a location where the wireless power transmitter is in transmission range from the wireless power receiver, wherein the wireless power transmitter is configured to transmit power from the battery source to the wireless power receiver when the portable electronic device is engaged to the base by the attachment structure.